Firefox: Styles the Awesomebar (url-bar popup) menu to look more native (Windows 8), compact and beautiful. Autoresizes, so scroll-bars are history! Do give feedback on improvements, etc. If you really like it, suggest it as a default for Firefox?

May require restart.

Hue

Greyscale

Minimalist

Light/Dark

To use this style, install Firefox and Stylish. If you already have Stylish, make sure this site is allowed to run JavaScript.